op amp sov

7/28/2019 op amp sov

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1/19 Unnamed Page (#1, 1/2)2011-07-28 10:01:36

Final Exam:

4 problems-

1. linear op amp (find vo, find R values given specific input(s) and

output, Find Rin=V/I)

2. comparator op amp

choose R,L,C for boxes given output graph

Graphs of signals in circuit

Diodes(on wire, off open)

3. AC input with multiple time dependent elements

Find V or I in frequency domain circuit. (Phasors)

4. thevenin equivalent circuit with dependent source and DC input.

Find RL to give max power transfer and power value.


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linear OpAmp

1. Assume 0V between +and - terminals

assume 0A (redraw circuit)

2. Make sure to take a loop through the 0V at the input terminals.

comparator:

1. solve circuit at terminal with fixed inputs.

2. Label graph according to which terminal needs to be greater to

achieve given output graph

3. Go through all possiblilities. Match possible values to see if graph

can be achieved.

Use the properties of L/C at t=0- and at infinity to make decisions.

For each choice, write general form equation.

4. Graph each voltage desired

5. Look at diode circuit ( line side of diode is negative)

Look at voltages present at each side of diode ignoring Resistances.

If diode is "on" replace with a wire. If "off" replace with an open.

Look at all possibilities on output graph.

frequency domain circuit:

already in frequent domain. Will have dependent source. Use Kirchoffs

laws, node V or mesh to solve.


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3/19 1270 CotterFinal Exam Solution_09.pdf (#2, 1/17)2011-07-28 10:01:36


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4/19 1270 CotterFinal Exam Solution_09.pdf (2/17)2011-07-28 10:01:37


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op amp sov

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